Bulugh al-Maram
Book 2, Hadith 92
Arabic hadith text
وَلِمُسْلِمٍ : { وَهُوَ يَؤُمُّ اَلنَّاسَ فِي اَلْمَسْجِدِ } .
Translation
Muslim has
"While he (ﷺ) led the people in the prayer in the masjid..."